Issue 10, 2011

Intramolecular [4+2] versus[2+2] cycloadditions in P–X–P-linked biphospholes (X = O, S)

Abstract

Under solar light at room temperature, the tungsten pentacarbonyl complex of the P–S–P-linked biphosphole (6) undergoes a [2+2] intramolecular cycloaddition. Then, this [2+2] dimer (7) gives the original [4+4] dimer (8) via a Cope rearrangement. This sequence stands in sharp contrast with the behavior of the corresponding P–O–P-linked biphosphole (2) which undergoes a classical [4+2] cycloaddition.

Graphical abstract: Intramolecular [4+2] versus[2+2] cycloadditions in P–X–P-linked biphospholes (X = O, S)

Supplementary files

Article information

Article type
Letter
Submitted
01 Feb 2011
Accepted
08 Mar 2011
First published
18 Apr 2011

New J. Chem., 2011,35, 2001-2003

Intramolecular [4+2] versus[2+2] cycloadditions in P–X–P-linked biphospholes (X = O, S)

M. P. Duffy, Y. Lin, L. Y. Ting and F. Mathey, New J. Chem., 2011, 35, 2001 DOI: 10.1039/C1NJ20087A

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